I love these "ball tipped" needles from STITCHY POP especially when I'm stitching with metallic fibers or on crystal fabrics! The tips help the fibers glide through the fabric without snagging the fibers.
Several stitchers have told me they love them for ALL their stitching, because they do not separate the floss.
There are two sizes in the tube---two of a "regular size" and one a bit larger. They do not exactly equate to regular cross stitch needles, but close. I recommend them for fabric that is 28ct, 32ct and maybe 36 ct.